Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB169426A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Priority to GB169426ApriorityCriticalpatent/GB262289A/en
Publication of GB262289ApublicationCriticalpatent/GB262289A/en
H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
Landscapes
Discharge Lamp
(AREA)
Abstract
262,289. Wade, H., (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Jan. 20, 1926. Residual gases.-To lessen the blackening of bulbs by deposition of tungsten thereon from the filament, a salt of hydrofluoboric acid, for example potassium boron fluoride, is used as a " getter."
GB169426A1926-01-201926-01-20Improvements in or relating to electric incandescent lamps
ExpiredGB262289A
(en)